Window attachment



' Sept. 1, 1942.

w. OWEN 2,294,851

WINDOW ATTACHMENT Filed July 2, 1940 Fig.

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| x A I I I 6 l5 d//L L/HM Owe-N Patented Sept. 1, 1942 WINDOW ATTACHMENT William Owen, Pittsburgh, Pa., assignor to Pittsburgh Plate Glass Company, Allegheny County, Pa., a corporation of Pennsylvania Application July 2, 1940, Serial No. 343,599

4 Claims.

The present invention relates to windows and more particularly to a. device for retarding free vertical movement of a double hung sliding window sash.

One object of the present invention is the provision of means to insure retention of the window sash in a raised position, particularly where the original weight of the window sash has been increased by the addition thereto of an auxiliary sash.

Other objects and advantages of the invention will become more apparent from the following detailed description of certain preferred embodiments thereof.

The increased demand for double glazed Windows has resulted in the creation of many structures which increase the insulating efficiency of windows. In new constructions, it is comparatively easy to design the supporting structures and frames so that they will accommodate oversized counterbalancing weights for the sashes. Where, however, it is desired to add an auxiliary sash to an existing window it is not always possible to increase the size of the counterbalancing weights for there is not sufficient room within the frame. Obviously, therefore, the additional weight of the window sash prevents it from being maintained in an open position unless some,

external holding device is provided.

Briefly stated, the present invention contemplates the interposition between the frame and the sash cord of a resilient body which will retard the free vertical movement of the window sash and thus serve to maintain the sash in a raised position.

In the drawing,

Figure l is a fragmentary elevational view of a window construction to which my invention is applicable;

Figure 2 is a fragmentary vertical sectional view on an enlarged scale of the retaining device; and

Figure 3 is a fragmentary elevational view of another form of the device.

Referring to the drawing, a frame I positioned within a wall 2 supports window sashes 3 for vertical sliding movement therein. Counterbalancing weights 5, lying within the frame I, are connected to the sashes 3 by sash cords 6 passing over sash pulleys 8, secured to the frame I.

In order to retard the free vertical movement of the sash 3 within the frame I a resilient body ID of sponge, rubber or similar material secured to a backing plate H is fastened to the frame I adjacent the sash pulley 8. The body I projects outwardly from the frame I to contact the sash cord 6 and to displace it from its ordinary line of travel. The frictional engagement between the sash cord 6 and the body ID will be sufficient to impart a braking action on the sash cord passing thereover. Accordingly, any inequalities in weight between the sash weights and sashes are counterbalanced.

When it is desired to open the window that portion of the sash cord contacting the body II] will not be under tension and the sash 3 is readily raised to the desired position. As soon as tension is again applied to the sash cord it will tend to bite into the body It and be subjected to a braking action thereby. In lowering the window it will be necessary to overcome the frictional force exerted by the resilient body l0 upon the sash cord. Thus substantially one-way braking action is provided to maintain the sashes and weights properly balanced.

Another form of the invention is illustrated in Figure 3, wherein a resilient body 14 is secured to the sash cord 6 by clips I5 adjacent the sash 3. The body 14 will project sufficiently to contact the frame I and the frictional engagement will normally prevent the window sash from slipping within the frame.

It will at once be obvious that various modi-.

fications in the nature of the several elements.

and their arrangement will be possible without, departing from the spirit of the invention or the. scope of the appended claims.

What I claim is:

1. In a window construction including sash structure and a counterweight of less weight; than the sash structure, a cable member connected to the counterweight and to the sash structure, a pulley rotatable in the upper portion of the window construction and having the cable trained thereover to support the sash struc ture on the cable for vertical movement whereby the sash structure tends to overbalance the counterweight, said window construction including an upright member adjacent the cable member, a deformable body secured to one of said members and pressed against the other member and constituting a one-way brake against downward movement of the sash structure to compensate for the greater weight of said structllre. e

2. In a window construction including sash structure and a counterweight of less weight than the sash structure, a cable member connected to the counterweight and to the sash structure,

a pulley rotatable in the upper portion of the window construction and having the cable trained thereover to support the sash structure for vertical movement whereby the sash structure tends to overbalance the counterweight, said window construction. including an upright stationary member adjacent the cable member, a deformable body secured to one of said members and pressed against the other member to frictionally engage the latter and compensate for the difference in weight between the sash structure and counterweight.

3. In a window construction including sash-- structure and a counterweight of less weight than the sash structure, a cable member connected to the counterweight and to the sash structure, a pulley rotatable in the. upper por-- tion of the window construction and having the cable trained thereover to support the sash, said window construction including an upright stationary member adjacent the cable member; and a yieldable rubber composition body disposed undercompression between said members bulging the cable out of line along the length thereof reaching from the pulley to the sash structure and constituting a one-way friction brake against downward movement of said sash.

4. In a window construction including sash structure and a pair of counterweights, cable members connected to the weights and to opposite edge portions of the sash structure, a pair of pulleys rotatable in the upper portion of the window construction and having the cable members trained thereover, said window construction including an upright stationary member adja cent the sash structure, and a yieldable body of rubber composition frictionally pressing against said-stationary member and secured to the latter cable and-holding it out of line between the cable connection to-the sash structure and its engagement'with the pulley, the latter cable depressing the yieldable body against the stationary membento form therewith a friction brake.

WILLIAM OWEN. 

